Equipment

Property Measurement Group / Instrumentation

This is the first of two PPMS systems in the facility. It provides magnetic field up to 9 T and temperatures from 1.7 K to 400 K. Users are able to perform DC magnetic moment, AC magnetic susceptibility, 2- and 4-wire magnetoresistance, photoconductivity, and Hall effect.

This system benefits from the PPMS EverCool-II™ dewar, which is the second generation of low-loss dewars with integrated Helium liquefier for the PPMS system from Quantum Design. It allows the continuous operation of the PPMS System without the supply with liquid Helium. The system is cryogen free for the user, and can hold temperatures below 2 K indefinitely.

This is second of two PPMS systems in the facility. It provides magnetic field up to 9 T and temperatures from 1.7 K to 400 K. Users are able to perform 2- and 4-wire magnetoresistance, thermal conductivity, heat capacity, Seebeck coefficient, and Hall effect measurements. The system is equipped with a turbo pump for the sample chamber.

The TriVista system is a triple spectrometer that has multiple input and detection ports that we can configure to provide Raman scattering down to 5 cm-1, photoluminescence excitation/emission spectral mapping, absorption, as well as spatial imaging of Raman scattering or photoluminescence with an infinitely tunable (in width and center wavelength) bandpass filter from 350 nm to 1000 nm. For Raman scattering, the system can operate in either additive mode for high resolution experiments or in subtractive mode for extreme stray light rejection. The system has both Si and InGaAs detectors, providing detection bandwidth from 350 nm to 1.7 microns. Light sources include a Xenon lamp (from which any spectral range can be selected without altering the illumination profile) and a laser at 532 nm. We are able to measure samples on solid substrates and liquids within cuvettes.